code: def setUp(self):
      super().setUp()
      client._client_manager = client._ClientManager()
  
file_path: generative-ai-python/tests/test_client.py
imports: import os
  from unittest import mock
  from absl.testing import absltest
  from absl.testing import parameterized
  from google.api_core import client_options
  import google.ai.generativelanguage
  from google.generativeai import client
label_desc: Use image node_id 1 for calling the ClientTests obj's underlying member method code with example usage: obj.setUp() without return types